{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T04:01:07Z","timestamp":1787025667004,"version":"build-2736575974"},"reference-count":25,"publisher":"Asian Spine Journal (ASJ)","issue":"1","license":[{"start":{"date-parts":[[2023,2,23]],"date-time":"2023-02-23T00:00:00Z","timestamp":1677110400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["asianspinejournal.org"],"crossmark-restriction":true},"short-container-title":["Asian Spine J"],"published-print":{"date-parts":[[2023,2,28]]},"abstract":"<jats:p>Study Design: Cadaveric biomechanics study.Purpose: This study investigated the effects of unilateral sacroiliac joint (SIJ) fixation for fusion with\/without L5\u2013S1 fixation on contralateral SIJ range of motion (ROM).Overview of Literature: SIJ fusion raises concerns that unilateral SIJ stabilization for fusion may increase contralateral SIJ mobility, leading to accelerated SIJ degeneration. Also, prior lumbosacral fixation may lead to accelerated SIJ degeneration, due to adjacent level effects. SIJ fixation biomechanics have been evaluated, showing a reduced-ROM, but SIJ fixation effects on contralateral nonfixated SIJ remain unknown.Methods: Seven human lumbopelvic spines were used, each affixed to six-degrees-of-freedom testing apparatus; 8.5-Nm pure unconstrained bending moments applied in flexion-extension, lateral bending, and axial rotation. The ROM of left and right SIJ was measured using a motion analysis system. Each specimen tested as (1) intact, (2) injury (left), (3) L5\u2013S1 fixation, (4) unilateral stabilization (left), (5) unilateral stabilization+L5\u2013S1 fixation, (6) bilateral stabilization, and (7) bilateral stabilization+L5\u2013S1 fixation. Both left-sided iliosacral and posterior ligaments were cut for injury condition to model SIJ instability before surgery.Results: There were no statistical differences between fixated and contralateral nonfixated SIJ ROM following unilateral stabilization with\/without L5\u2013S1 fixation for all loading directions (&lt;i&gt;p&lt;\/i&gt;&gt;0.930). Injured condition and L5\u2013S1 fixation provided the largest motion increases across both joints; no significant differences were recorded between SIJs in any loading direction (&lt;i&gt;p&lt;\/i&gt;&gt;0.850). Unilateral and bilateral stabilization with\/without L5\u2013S1 fixation reduced ROM compared with the injured condition for both SIJs, with bilateral stabilization providing maximum stability.Conclusions: In the cadaveric model, unilateral SIJ stabilization with\/without lumbosacral fixation did not lead to significant contralateral SIJ hypermobility; long-term changes and &lt;i&gt;in vivo&lt;\/i&gt; response may differ.<\/jats:p>","DOI":"10.31616\/asj.2021.0492","type":"journal-article","created":{"date-parts":[[2023,2,27]],"date-time":"2023-02-27T21:03:31Z","timestamp":1677531811000},"page":"185-193","update-policy":"https:\/\/doi.org\/10.31616\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["An In Vitro Biomechanical Analysis of Contralateral Sacroiliac Joint Motion Following Unilateral Sacroiliac Stabilization with and without Lumbosacral Fixation"],"prefix":"10.31616","volume":"17","author":[{"given":"Woojin","family":"Cho","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenhai","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hyun Jin","family":"Lim","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brandon 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transarticular","author":"Soriano-Baron","year":"2015"},{"key":"ref18","doi-asserted-by":"publisher","DOI":"10.3171\/2017.7.spine17499"},{"key":"ref19","first-page":"E162","volume-title":"Lumbar fusion leads to increases in angular motion and stress across sacroiliac joint: a finite element study","author":"Ivanov","year":"2009"},{"key":"ref20","doi-asserted-by":"publisher","DOI":"10.1002\/(sici)1097-0185(199805)251:1<15::aid-ar4>3.0.co;2-d"},{"key":"ref21","doi-asserted-by":"publisher","DOI":"10.1016\/j.clinbiomech.2006.08.006"},{"key":"ref22","doi-asserted-by":"publisher","DOI":"10.2106\/jbjs.e.01363"},{"key":"ref23","doi-asserted-by":"publisher","DOI":"10.1016\/j.jbiomech.2006.01.017"},{"key":"ref24","first-page":"E1053","volume-title":"Sex specific sacroiliac joint biomechanics during standing upright: a finite element study","author":"Joukar","year":"2018"},{"key":"ref25","first-page":"131","volume-title":"Evaluation of a minimally invasive procedure for sacroiliac joint fusion: 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